Load, Dummy DA-75/U

TM 11-5820-554-12

nents of a portable ssb or cw station. It will

a. Description and Use. The Collins CC 3 is

accommodate either the Collins 30L-1 or the Collins

specially built carrying case for accessory components

KWM-2/2A with the PP-3990/FRC-93. Adequate

of a portable ssb or cw station. It will accommodate

space is included for a coiled antenna, a microphone, a

Control, Radio Set C -6118/FR-93 or C- 7515/FRC-

headset, and a key. Also a loudspeaker is included in

93, Power Supplies PP-4765/GRC- 159 or Collins

the PP-3990/FRC - 93. The complete package (CY-

MP-1, a dipole antenna, and a 90- day supply of spare

6197/GRC-159,CollinsKWM-2/2A,

and

PP-

tubes, fuses, etc. This carrying case, packed with the

990/FRW93) makes up a highly portable, 100-watt

desired selection of accessories, the CY - 6197/GRC -

ssb or cw communications station. The addition of

159 (C CC- 2) with KWM-2/ 2A/PP-3990/FRC-93

another CY-6197/ GRC-159 with the Collins 30L-1

combination, and the Collins CC- with the Collins

completes a 1-kilowatt communications station in two

30L-1, makes up a completely versatile 1-kw station

packages, either of which weighs less than 50 pounds.

arrangement. Either fixed portable operation with

Figure 14-5 shows the Collins KWM-2/2A and PP-

complete station facilities or any kind of mobile

3990/FRC-93 packed in the CY - 6197/GRC-159. Be

operation may be planned. The total weight of any

sure to place the Collins 30L-1 in the hinged side of

one of the three cases, packed in any choice of

the case. This leaves adequate space for packing

equipment, is less than 50 pounds. Figures 14 6 and

lightweight articles above the control panel or at either

14-7 show the Collins CC-2 packed with Control,

side of the Collins 30L-1. DO NOT pack heavy

Radio Set 7515/FR C- 93 (Collins 312B-5) and either

articles between the control panel and the handle side

Power Supply PP 4765/GRC-159 or the Collins MP-

of the case or damage to the controls may result.

When moving or storing, make sure the latches are

b. Tabulated Data.

Overall dimensions .............

21.5 inches long by 21

secured, and store with the handle up. DO NOT

............................................

inches deep by 9.5 inches

attempt to operate the equipment with the case closed,

............................................

high.

or overheating will result. When shipping, request

Weight (empty) ...................

10 pounds.

special handling.

Weight (packed with Collins

41 pounds (approx).

b. Tabulated Data.

312B - 15, PP - 4765/GRC-,

antenna, and 90-day spares).

Overall dimensions ..............

21.5 inches long by 21

Weight (packed with Collins

36 pounds (approx).

............................................ i

inches deep by 9.5 inches

312B-4/5, Collins MP-1, antenna,

............................................

high.

and 90-day spares).

Weight (empty) ....................

9.5 lb.

Weight (packed with Collins

42 lb (approx).

14-6. Load, Dummy DA-75/U

KWM-2/2A and PP-3990/ FRC-93).

Load, Dummy DA-75/U employs resistive impedance,

Weight (packed with Collins

47.5lb(approx)

and is used for testing am and fm transmitters. With

30-L)

forced-air cooling it will dissipate 2 kilowatts peak,

and 500 watts with static cooling. It operates in the

1.3- to 2, 700-MHz frequency range. The overall

dimensions are 19 7/16 inches long, 5 5/16 inches

wide, and 8 7/16 inches high. Its impedance is 51.5

ohms, and has an input connector for Plug UG-154/U

located coaxially at one end.

14-7.Operator's Maintenance Instructions

for Dummy Load DA-75/U

Refer to paragraphs 3-19. 3-20, 3-21, 3-23, and 24

for operator's maintenance instructions. Paragraph 3-

24 covers cleaning of the equipment.

14-8. Organizational Maintenance

Instructions for Dummy Load DA-

75/U

Figure 14-4. Case ,Electrical Equipment CY-

Refer to paragraph 3-25 through 3-28 for

6197/GRC-159.

organizational maintenance instructions. Paragraph 29

14-5. Case, Electrical Equipment (Collins

covers touchup painting.

14-2